What happened?

subnets created by awsx.ec2.vpc do not get ipv6 netblocks assigned.

Sample

const vpc = new awsx.ec2.Vpc(`k3s-vpc-${currentStack}`, {
    assignGeneratedIpv6CidrBlock: true,
    cidrBlock: cidrBlock,
    enableDnsHostnames: true,
    enableDnsSupport: true,
    natGateways: { strategy: "None" },
    subnetSpecs: [
        { type: awsx.ec2.SubnetType.Private, cidrMask: 24 },
        { type: awsx.ec2.SubnetType.Public, cidrMask: 24 }
    ],
});

Expected Behavior

subnets created have an ipv6 address associated with them

Steps to reproduce

run the code

Output of pulumi about

CLI
Version 3.75.0
Go Version go1.20.5
Go Compiler gc

Plugins
NAME VERSION
aws 5.42.0
aws-native 0.69.0
awsx 1.0.2
docker 3.6.1
nodejs unknown

Backend
Name pulumi.com

Dependencies:
NAME VERSION
@pulumi/aws 5.42.0
@pulumi/awsx 1.0.2
@pulumi/pulumi 3.76.0
@types/node 18.16.19
ip-num 1.5.1
typescript-string-operations 1.5.0
typescript 5.1.6
@pulumi/aws-native 0.69.0

Additional context

No response

Contributing

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